Zeta Cassiopeiae, a blue subgiant star in Cassiopeia
Zeta Cassiopeiae is a blue subgiant star in the constellation Cassiopeia. At 592 light years away, it is the 353rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.69.
Zeta Cassiopeiae (HIP 2920)
Zeta Cassiopeiae is a blue subgiant star in the constellation Cassiopeia. At 592 light years away, it is the 353rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.69. The iron abundance of Zeta Cassiopeiae is -0.08 (83.2% of the Sun). It is moving through the Galaxy at a speed of 17.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 28,000 light years from the center of the Galaxy.
Sky position: RA 0h 37.0m, Dec +53° 54'
Common designations: Zeta Cassiopeiae, 17 Cassiopeiae, HIP 2920, HD 3360
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Brightest stars in Cassiopeia:
(list all)
| Rank | Mag. | Star |
| 1 | 2.15 | Gamma Cassiopeiae |
| 2 | 2.24 | Schedar |
| 3 | 2.28 | Caph |
| 4 | 2.66 | Ruchbah |
| 5 | 3.35 | Segin |
| 6 | 3.46 | Eta Cassiopeia |
7
| 3.69
) Zeta Cassiopeiae
| Rank | Mag. | Star |
| 8 | 3.95 | 50 Cassiopeiae |
| 9 | 4.17 | Kappa Cassiopeiae |
| 10 | 4.34 | Marfak |
| 11 | 4.46 | Iota Cassiopeiae |
| 12 | 4.48 | Omicron Cassiopeiae |
| 13 | 4.49 | A Cassiopeiae |
| 14 | 4.51 | Rho Cassiopeiae |
| 15 | 4.62 | Upsilon-2 Cassiopeiae |
| 16 | 4.68 | Chi Cassiopeiae |
| 17 | 4.72 | Psi Cassiopeiae |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Zeta Cassiopeiae
(compared to the Sun)
E
ccentricity: 6.9% vs. 16.0%Angle φ : -9.2°vs. 26.0°
Semi-major axis : 8,044 pc vs. 8,686 pc
Semi-minor axis: 8,024 pc vs. 8,574 pc
Focus-to-center
: 556 pcvs. 1,388 pcSemilatus rectum : 8,005 pc vs. 8,464 pc
Perigalacticon: 7,487 pc vs. 7,297 pc
Apogalacticon
: 8,600 pcvs. 10,074 pcSome Tabulated XHIP Data for Zeta Cassiopeiae
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 9.24277909° ±0.10 mas | 17.38 ±0.13 mas/yr. |
| Declination: | 53.89693155° ±0.10 mas | -9.86 ±0.11 mas/yr. |
| Galactic Longitude: | 120.77568434° | 16.79 mas/yr. |
| Galactic Latitude: | -8.91423999° | -10.83 mas/yr. |
Parallax: 5.50 ± 0.16 mas
Spectrography
Spectral Type: B2IV 2009A&A...501..297Z.
Radial Velocity: -0.20 ±0.10 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
-0.08 dex
2011A&A...525A..71W.
Photometry
| band | magnitude | Abs. Mag. |
| U | 2.58 | -3.72 |
| B | 3.49 | -2.80 |
| V | 3.69 | -2.61 |
| R | ||
| I | 3.88 | -2.42 |
| J | 4.14 | -2.16 |
| H | 4.25 | -2.05 |
| K | 4.25 | -2.05 |
B-V: -0.20 V-I: -0.19
Derivations
Heliocentric distance: 181.63 pc (2.9% margin of error)
Galactocentric distance: 7,494 pc
Transverse velocity: 17.2 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -91.8 pc | 154.2 pc | -28.1 pc |
| Velocity (U, V, W) | -11.6 km/s | -8.8 km/s | -9.2 km/s |